Workmen, who include Idaho and a boy, pose near a Nagle vertical center crank water pump in the bottom of an excavation pit at the Alameda Avenue underpass construction site in Denver, Colorado. Clayton Ryan, on horseback, is near Idaho.

Accession number: 90.152.232; Condition: emulsion deterioration on glass negative.; Formerly W-15.; Hand-written on back of print: "Construction scene at bottom of excavation near concrete embankment forms--Alameda Ave subway. Engine in front is a Nagle vertical center crank (probably oversquare 5x6 or 6x7) driving centrifugal pump by belt. Man to right of horse was a worker employed by the C. Ryan construction & excavating company; he was nicknamed "Idaho" but source could not recall his given name. Boy on horse may be Clayton Ryan, son of the Clayton Ryan who operated the construction company.; Title penciled on negative sleeve.; R7200000159